Trending: Nanning residents live 20cm from roaring overpass
(chinadaily.com.cn) Updated: 2014-11-11 12:27
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Staircase plays key notes
A staircase which is designed like a piano and emits sounds and lights with each step was installed at an exit of a subway station in Zhengzhou city of Central 皇冠体育app's Henan province Thursday, gmw.cn reported.
The 26 step staircase at the Exhibition Center Station on Zhengzhou Subway Line One has sensor installations. It leads to a high-end supermarket.